Non-poisonous ink Synonyms

Definitions for Non-poisonous

(adjective) not producing poison
(adjective) safe to eat

NI abbreviation

NI is an abbreviation for Non-poisonous Ink

What does NI stand for?

NI stands for "Non-poisonous Ink"

Definitions for Ink

(verb) to write one's name on (as a document )
(noun) a liquid used for printing or writing or drawing
(noun) dark protective fluid ejected into the water by cuttlefish and other cephalopods